Cutter-head.



.- UNITED STATES PATENT OFFICE.,

SAMUEL MACDONALD LANGSTON, OF PHILADELPHIA. PENNSYLVANIA..

CUTTER-HEAD,

SPECIFICATION forming part of Leiters Patent No. 692,1 55, aateafranuary. 2s, 1902.

Application tied August ze, 190i. serial No. 73,589. oro modele To all whom t'mwy concern:

Be it known niet I, SAMUEL MACDONALD,

LANGSTON, a citizen of thefUnited States, and a resident of Philadelphia, in Vthe county of Philadelphia and State ofPennsylvania, have invented a new and Improved Cutter-Head, of which the following is afull, clear, and exact description.

My invention relates to cutter-heads of the type used in securing annular cutters `upon a rotary shaft for the purpose of cutting thin material-such as tinplate, brass, &c.-

` whether in rolls or sheets.

y Reference is to behad to the accom panying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in both thefigures.

Figure l is an elevation showing the cutterhead with cutter attached ready to bev mounted upon a shaft, and Fig. 2 is a section pn the line as of Fig. 1 looking in the direction of the arrows.-

An annular band of steel 1, having more or less elasticity, is provided internally with the broad coneaved lugs 2, 3, and 4c, which have such conformity that they readily engage the outer surface of a cylindrical shaft. By` means of screws 5, G, and 7 the cutter S, provided with the cutting edge 9, is secured upon the ring. The ring is split, as 'shown at 10, and is provided with recesses'l 1, through which passes loosely the screw 12, provided with a screw-head 14: for the purpose of drawing the lug 10 into proximity with the end 15 of the ring l. The screws 5, t5, and 7 hold the4 cutter-head rigidly in contact with about three-quarters of the ring, but leave about one-quarter ofthe ring free to move, except for the action of the screw l2. This part of the ring is provided with the lug 2, softhat this lug has a slight relative movement towardthe other lugs and also relatively to the position of the annular cutter 8.

y The operation ofmy invention is as follows :v

It beingdesired to mount the cutter upon a shaft, the cutter-head is slipped over -the cylindrical part of the shaft, which of course it fits quite snugly. The screw- 12 is yslightly loosened for the purpose. The loosening of the screw does not `disturb the greater portion of the annular ring, but merely allows the free portion thereof, (shown at theleft of i* 1,)upon which the lug-.2 is mounted, to

spring slightly outward. VThe idea is that when the cutter-head is placed upon the shaft the lugs 3 and 4.- will fit the same exactly and are perfectly' rigid Tela-tively to each. other. `The lug 2 has a very slight movement toward and from the center of the axis of the shaft, and it is the movement of thislug alone which causes all of the lugs to grip firmly upon the shaft-that is to say, if the lugs 3 and 4 fit 'the shaft exactly and are immovable relatively to each other and the lug 2 has a slight movement toward and from the axis the movement of this lug alone is all that is necessary to tighten or loosen `all of the lugs simultaneously upon the shaft. The annular ring 1 may be resilient or not, as desired, throughout its entire length; but in anyevent the free end (shown to the left of the'drawing in Fig. 1) must be resilient, and if the other portions of the ring are secured to the cutter by means of the screws, so that said other portions have no movement relatively to said head,the effect will be the same as if about three-quarters of the ring were not resilient. It will be seen, therefore, that when the cutter is mounted upon the ring and' the ring is mounted upon the shaft the tightening or loosening of the screw 12 by means of the screw-head 14 hasthe effect not only'of tightening or loosening the cutter as awvhole,

ter-head and yet causes all of Vthe lugs to engage firmly and to disengage positively.

By means of the above arrangement a cutas to be practically integral therewith and to have no 'rocking movement 4or undesirable play whatever and yet can be readily disengaged. There are no other parts which can work loose, and the seating of the`cutter is about as perfect as could be desired. Qfconrse any number ot" said cutters can-bo arranged upon a shaft side by side, and the lugs can be placed eitherin j uxtaposiiion or madeto break joints with each other, as desired.

Having thus described my invention, I claim as new and desire to secure by Letters Pat-ent- K 1. As an articleof manufacture, a cutter head comprising a` split ring provided with but that it moves onlya local part of thecutter can be secured so rigidly upon the shaft).

bearing-lugs and also provided with normally v head, comprising a split ring of resilient metal Vfree ends,

leaving one of said ends free -to move,

,curing the same upon 'saidring so as to conspaced apart from each Y an annular cutter rigidly securedt0 said split ring at a. plurality of points but' A and a screw forv actuating. the movableI end relatively to said 'other end. l f 2. As'an article of manufacture, a cutterhead, comprising a split ring of resilient metal provided-with normally free ends and with bearing-lugs, an annular cutter,ls`c'rews for se-l center of -said ring.' A

4; As an article of manufacture, a. cutterhead, comprising a split ring; provided with normally'free ends, means for rigidly securing an annulai cutter upon said ring, so that one of said free ends has aslight movement relatively to said cutter, lugs mounted within said ring, one of saidlugs being on one 'of said ine'one of said free ends thereof, and means for actuating the other free end thereof rela-- tively to said cutter for thepurposeof engaging and disengaging a shaft.

3. As anfrarticlenf manufacture, a cuttersame, and means for changing the relative. position of said normallyfree end for the purupon'the shaft. s

11n testimony whereofvI have signed my provided with. lugsintegral therewith and other, and screws for securing au Vannularcutter .to said ring, the relative location of said ring and screws being such .that only a single lug is free to move relatively to said cutter, and a screw for dilatng and contracting said ring, thereby actwo subscribing Witnesses.

' SAMUEL MACDONALD LANGSTON. VVitness'es: y

EDWARD WALKO,

GEORGE, W. Limi/IAN.

tuating said single lng toward and from the' normally free ends and free to .move with the lpose of actuating said lug movable therewith, .and thereby clamping all of 'said lugs rmly fname to this 'specification in the presen'cejof- 4o 

